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1. Not the first leech: An unusual worm from the early Silurian of Wisconsin.

Author

Braddy, Simon J., Gass, Kenneth C., and Tessler, Michael

Subjects
*LEECHES, *ANNULATION, *BIOTIC communities, *MOLTING
Abstract

An unusual worm, previously interpreted as the earliest leech, is described from the early Silurian (Llandovery, Telychian) Brandon Bridge Formation Lagerstätte (Waukesha Biota) of Wisconsin (~437 Ma). Lacking preserved internal organs, it is up to ~16 cm long, 8.2 mm wide, with ~250 annulations and a circular structure at one end, interpreted here as the broken end of a molt. It is therefore referred to Cycloneuralia incertae sedis. [ABSTRACT FROM AUTHOR]

Published
2023
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